B5DH222Wireless Microphone

Preliminary Users Manual Electro-Voice Model REV-PH Handheld Wireless Microphone Transmitter The Electro-Voice (Ev) REV-PH is a Professional Grade Wireless Handheld Transmitter operating in the UHF frequency range. The REV-PH combines frequency agility and ease of use like no other. The transmitter operates within a 24 MHz wide segment in 25 KHz steps. The high quality audio circuitry and advanced Radio Frequency (RF) signal processing offer broadcast quality signal-to-noise and audio clarity. System features include: • Durable Painted Molded Handle. • Screw-on microphone elements for changeability. • Permanent Flash Memory for frequency/setting storage. • On-Loc prevents accidental power off (when set). • LCD Display for ease of viewing. • Internal Half Wave Dipole Antenna. Quick set-up: 1. With the Power Switch on the transmitter OFF, install fresh batteries into the transmitter. 2. To prevent feedback or unintentional noise, mute the audio mixer/amplifier or other device during set-up adjustments. Place the transmitter Power Switch to the ON position. 3. The operating screen (display) light will come on momentarily. The display will show the current frequency group and channel. Note: Anytime Power is removed and turned back on, the GP/CH screen will be displayed. The Low Battery light will flash momentarily. REV-PH Users Manual Page 2 Quick set cont’d. 4. If the Group and Channel match the desired receiver group and channel, proceed to Step 9. If not, proceed to Step 5. 5. To select a different GP/CH, press SET one time. The Group will start flashing. Use the up and down arrows to change the group number. Press the SET button to save the Group. After setting the Group, The Channel number will start flashing . Use the up/down arrows to change the Channel number. Press SET and the channel is now saved. There are 18 Groups and up to 16 Channels (preferred groups/channels) stored in memory. If desired, you can create new groups/ channels but you must change to a new frequency to store in that group/channel. In order to select a new frequency, you must have a “users” group /channel selected. Press the SET button. The Group should be flashing. Press the Up arrow until group 19u (user programmable) is found. (group 20u can also be used) Press SET. The Channel should now be flashing. Select a channel with the up/down arrow. Press SET. You are now ready to select a frequency to store in the users group above. Press and hold the set and down arrows at the same time for 3 seconds and release to go to the next screen function. 8. The next screen displays the operating frequency of the group/channel. If there is no frequency currently stored in the selected users group/channel, a dashed line will be shown. Press SET. The dashed line or frequency will start flashing. Press the up arrow one step at a time to find the desired frequency or hold down the up arrow to scroll through the frequencies quickly. The frequencies can be scrolled either way by the up/down buttons. When the desired frequency is showing, press SET. REV-PH Users Manual Page 3 Quick set cont’d. 9. Press the set and down arrows at the same time then release to go to the next screen function. 10. The next screen shows the battery level in % (percent). Press the set and down arrows at the same time then release to go to the next screen. 11. The next screen shows the audio setting. The display is shown in dB. 0 dB is (maximum volume), -27 dB is (minimum volume). Press the set and down arrows at the same time then release to go to the next screen. Setting the attenuator for the maximum Audio Meter reading on the receiver without peak distortion will produce the best signal to noise ratio. 11. The next screen shows the transmitter RF level (Lo or Hi). Press the Set button if you wish to change the RF level. Press the up button to go to Hi or the down button to go to Lo. Press Set to store. The transmitter RF is normally shipped set to “Lo” for use with multiple frequency systems and the best battery life.“Hi power can be selected for longer distances or to suppress noise or interference. The nominal power in Hi is 50 milliwatts. 12. Press the set and down arrows at the same time then release to go to the next screen function, which will return to the Gp/Ch screen. The display screen will automatically show the Gp/Ch screen when the transmitter is first turned on. 13. When power off is required, simply place the power Off-On switch in the OFF position. The display will then delay slightly to allow the receiver to shut down quietly. REV-PH Specifications: Page 4 RF Frequency range........................614.0 to 746.0 MHz. RF Channel Step................................ 25 KHz RF Power....................................Norm, 5 mW, High, 50 mW. Modulation..................................FM, 40 KHz Deviation nominal. Audio Frequency Response...............80-15000 Hz +/- 2 dB. Audio attenuator Range....................27 dB. Microphones, Electret or Dynamic...... Electret bias provided. Antenna......................................Internal Half Wave. Battery Life (9 Volt Alkaline)..................... 8-10 Hours Typical. Approval Information: The Telex/Ev REV-PH Transmitter is Type Accepted under United States Federal Communications Commission Part 74. The Telex/Ev REV-PH Transmitter is Certified to Industry Canada RSS123 rules. Licensing of Telex/Ev equipment is the users responsibility and licensability depends upon the user’s classification, user’s application and frequency selected. Telex/Ev strongly urges the user to contact the appropriate telecommunications authority for any desired clarification. CAUTION: Any changes or modifications made to the above equipment could void the user’s authority to operate the equipment.

Federal Communications Commission January 15, 2007 Office of Engineering and Technology Equipment Authorization Division 7345 Oakland Mills Road Columbia, Maryland 21046 Subject: Permanent Confidentiality request for FCC ID: B5DH222 To whom it May Concern, Pursuant to sections 0.457 and 0.459 of CFR 47, the applicant requests permanent confidential treatment of the following information accompanying this application, as listed below. Block Diagrams Schematics Operational Description Parts List Tune up Procedures In accordance with the public notice DA-04-1705, dated June 15, 2004, we hereby request short term (45 days) confidentiality for the following items: Internal Photos External Photos Users Manual These materials contain trade secrets and proprietary information not customarily released to the public and the public disclosure of these materials might be harmful to the applicant and provide unjustified benefits to its competitors. Sincerely, Charles E. Conner Project Engineer Telex Communications Inc. 8601 E. Cornhusker Hwy Lincoln, NE 68507

External Photos

ID LABEL LOCATION

Internal Photos

REV-PH Theory of Operation A. Audio Input from the microphone is amplified by U1 and associated components. U2 is a digital potentiometer that is controllable via a user menu. It varies the gain from 0 to 27 dB in 3dB steps. Q1 is a high pass filter with a cutoff frequency of 80Hz. C11, R14 and R15 provide pre-emphasis at 330 microseconds. U3 is a 2:1 compressor that is used for noise reduction. 330 microseconds of pre-emphasis are also used to feed the rectifier input of U3. An additional 50 microseconds of pre-emphasis is provided by C22, R24, R25, and R26. U4B is also used as a modulation limiter. This stage is simply allowed to clip and no gain reduction is employed. U15 is a low pass filter with a cutoff frequency of 30 kHz. VR2 is used to set the level of an ultrasonic tone used for squelch coding. VR1 is used to set the frequency deviation. B. RF Output HY1 is a VCO that runs at the output frequency. No multiplication takes place in the RF chain. Q6, Q9, and Q11 buffer and amplify the carrier. C75, C76, C77, L7 and L8 form a matching network and low pass filter. Q10 is used to control the current through the amplifier section. Q5 is used to switch the amplifier on after the synthesizer achieves lock. C. Synthesizer U14 is a PLL that is serially loaded from microprocessor U12. RF from the VCO is fed to the PLL via C63 and R77. Y1 provides the reference frequency for U14. VC1 is used to set this to exactly 4 MHz. U14 controls the VCO through the loop filter consisting of R74, R75, C58, C59 and C60. Modulation is fed to the bottom of C59.

Flom Test Labs 3356 N. San Marcos Place, Suite 107 Chandler, Arizona 85225-7176 FCC ID: B5DH222 (866) 311-3268 phone, (480) 926-3598 fax MFA p06b0009, d06c0036 Date: December 29, 2006 Federal Communications Commission Via: Electronic Filing Attention: Authorization & Evaluation Division Applicant: Telex Communications, Inc. Equipment: REV-PH FCC ID: B5DH222 FCC Rules: 74H Gentlemen: On behalf of the Applicant, enclosed please find Application Form 731, Engineering Test Report and all pertinent documentation, the whole for approval of the referenced equipment as shown. Filing fees are attached. We trust the same is in order. Should you need any further information, kindly contact the writer who is authorized to act as agent. Sincerely yours, Hoosamuddin S. Bandukwala, Lab Director enclosure(s) cc: Applicant HSB/wb Flom Test Labs 3356 N. San Marcos Place, Suite 107 Chandler, Arizona 85225-7176 FCC ID: B5DH222 (866) 311-3268 phone, (480) 926-3598 fax MFA p06b0009, d06c0036 Date: December 29, 2006 Federal Communications Commission Via: Electronic Filing Attention: Authorization & Evaluation Division Applicant: Telex Communications, Inc. Equipment: REV-PH FCC ID: B5DH222 FCC Rules: 74H Gentlemen: On behalf of the Applicant, enclosed please find Application Form 731, Engineering Test Report and all pertinent documentation, the whole for approval of the referenced equipment as shown i.e.: a) Application Form b) Test Report (if applicable) c) Filing Fees d) Copy of Original Grant e) Expository Statement and/or letter by Applicant f) Photos (if applicable) g) Label Drawing (if changes have been made) We trust the same is in order. Should you need any further information, kindly contact the writer who is authorized to act as agent. Sincerely yours, Hoosamuddin S. Bandukwala, Lab Director enclosure(s) cc: Applicant HSB/wb Flom Test Labs 3356 N. San Marcos Place, Suite 107 Chandler, Arizona 85225-7176 FCC ID: B5DH222 (866) 311-3268 phone, (480) 926-3598 fax MFA p06b0009, d06c0036 Transmitter Certification of FCC ID: B5DH222 Model: REV-PH to Federal Communications Commission Rule Part(s) 74H Date of report: December 29, 2006 On the Behalf of the Applicant: Telex Communications, Inc. At the Request of: Telex Communications, Inc. 8601 E. Cornhusker Highway P.O. Box 5579 Lincoln, NE 68505-5579 Attention of: Charles E. Conner, Project Engineer (402) 467-5321; FAX: -3279 E-mail: [email protected] Jim Andersen Email: [email protected] Supervised by: Hoosamuddin S. Bandukwala, Lab Director Flom Test Labs 3356 N. San Marcos Place, Suite 107 Chandler, Arizona 85225-7176 FCC ID: B5DH222 (866) 311-3268 phone, (480) 926-3598 fax MFA p06b0009, d06c0036 Transmitter Certification of FCC ID: B5DH222 Model: REV-PH to Federal Communications Commission Rule Part(s) 74H Date of report: December 29, 2006 On the Behalf of the Applicant: Telex Communications, Inc. At the Request of: Telex Communications, Inc. 8601 E. Cornhusker Highway P.O. Box 5579 Lincoln, NE 68505-5579 Attention of: Charles E. Conner, Project Engineer (402) 467-5321; FAX: -3279 E-mail: [email protected] Jim Andersen Email: [email protected] Supervised by: Hoosamuddin S. Bandukwala, Lab Director Flom Test Labs 3356 N. San Marcos Place, Suite 107 Chandler, Arizona 85225-7176 FCC ID: B5DH222 (866) 311-3268 phone, (480) 926-3598 fax MFA p06b0009, d06c0036 List of Exhibits (FCC Certification (Transmitters) - Revised 9/28/98) Applicant: Telex Communications, Inc. FCC ID: B5DH222 By Applicant: 1. Letter of Authorization 2. Confidentiality Request: 0.457 And 0.459 3. Identification Drawings, 2.1033(c)(11) Label Location of Label Compliance Statement Location of Compliance Statement 4. Photographs, 2.1033(c)(12) 5. Documentation: 2.1033(c) (3) User Manual (9) Tune Up Info (10) Schematic Diagram (10) Circuit Description Block Diagram Parts List Active Devices 6. MPE/SAR Report By M.F.A. Inc.: A. Testimonial & Statement of Certification Flom Test Labs 3356 N. San Marcos Place, Suite 107 Chandler, Arizona 85225-7176 FCC ID: B5DH222 (866) 311-3268 phone, (480) 926-3598 fax MFA p06b0009, d06c0036 The Applicant has been cautioned as to the following: 15.21 Information to the User. The users manual or instruction manual for an intentional radiator shall caution the user that changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment. 15.27(a) Special Accessories. Equipment marketed to a consumer must be capable of complying with the necessary regulations in the configuration in which the equipment is marketed. Where special accessories, such as shielded cables and/or special connectors are required to enable an unintentional or intentional radiator to comply with the emission limits in this part, the equipment must be marketed with, i.e. shipped and sold with, those special accessories. However, in lieu of shipping or packaging the special accessories with the unintentional or intentional radiator, the responsible party may employ other methods of ensuring that the special accessories are provided to the consumer, without additional charge. Information detailing any alternative method used to supply the special accessories for a grant of equipment authorization or retained in the verification records, as appropriate. The party responsible for the equipment, as detailed in § 2.909 of this chapter, shall ensure that these special accessories are provided with the equipment. The instruction manual for such devices shall include appropriate instructions on the first page of text concerned with the installation of the device that these special accessories must be used with the device. It is the responsibility of the user to use the needed special accessories supplied with the equipment. Flom Test Labs 3356 N. San Marcos Place, Suite 107 Chandler, Arizona 85225-7176 FCC ID: B5DH222 (866) 311-3268 phone, (480) 926-3598 fax MFA p06b0009, d06c0036 Table of C…

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Test Setup Photos